Air conditioner



FIG. 1 is a top, front, and right side view of our design for an air conditioner;

FIG. 2 is an enlarged front view thereof;

FIG. 3 is an enlarged top plan view thereof;

FIG. 4 is an enlarged bottom view thereof;

FIG. 5 is an enlarged back side view thereof;

FIG. 6 is an enlarged side view thereof, the side opposite being a mirror image;

FIG. 7 is a top, front, and right side view thereof, in which a covering member for covering a controlling unit is opened; and,

FIG. 8 is a side view thereof when the air conditioner is installed in a house for use, the section of a house being shown in broken lines for illustrative purposes only. 

We claim the ornamental design for an air conditioner, as shown and described. 